class_docstr: Tests reduce pooling layer.
      
code: def setUp(self):
      tf.test.TestCase.setUp(self)
  
      self._batch_size = 64
      self._seq_length = 16
      self._emb_dim = 100
  
imports: import numpy
  import tensorflow
  import tensorflow.contrib.rnn
  import texar.tf
  from texar.tf import context
  from texar.tf.hyperparams import HParams
  from texar.tf.core import layers
label_desc: Use image node_id 1 for calling the ReducePoolingLayerTest obj's underlying member method code with example usage: obj.setUp() without return types